Error with fetchAll using order by

Question

I’m making a task scheduling system.

I need to show these tasks to the user, created a file called tarefas.php to query the Mysql database:

<?php
    include_once 'conexao-calendario.php';
    include_once 'VerificarLogin.php';
    $usuario = $_SESSION['email'];

    $sql = "SELECT id, titulo, local, data, horario, status FROM eventos WHERE email = '$usuario' ORDER BY data, hora ";
    $select = $pdo->prepare($sql);
    $result = $pdo->query($sql);
    $dados = $result->fetchAll( PDO::FETCH_ASSOC );
    var_dump($dados);
?>

Without the order by appears the correct array, but with it gives the following error:

Fatal error: Uncaught Error: Call to a Member Function fetchAll() on Boolean in C: xampp htdocs Hope tasks.php:9 Stack trace: #0 {main} thrown in C: xampp htdocs Hope tasks.php on line 9